Thank you. Originally, "Pictures" on my MacBook had subfolders for each of 9 days and thumbnails showed properly. LCat catalog was in a different folder. Preparing to move images and catalog from McBook to desktop, I moved the 9 image folders to a subfolder in the same folder as LCat. LR then displayed the blanks below. No folders below the Pictures folder, no image count shown in Pictures, no thumbnails. I never saw "!" or "?" symbols (although I have on past occasions.) Keywords remained. After reading one article, I tried to rename the Pictures folder and discovered that it is not possible. I can't find a way to redirect LR to look elsewhere. for the photos. The image files are still there, but I fear the LR work I've done will be lost. Your help is appreciated.